I suppose I could send emails to real companies to get unsubscribed - but you already said that anyone can use someone else's email address, so how do I know if it's the real company that sent me the email? How do I know it's not just some lowlife trying to put together a mailing list he can sell?
You can usually tell by looking at the e-mails. If it looks like a shop and it’s trying to sell stuff, it probably is from that shop. Mails from financial institutions (including PayPal), though, are usually spam unless you really do have an account with them — and even then, it’s safest to never, ever click on any links in those mails. Rather, go to your bank’s (or whatever) site yourself in your web browser.
Also, you can check where links go before clicking on them: hover your mouse pointer over them (don’t click!) and you should get a popup that shows you where the link actually goes. For example, here’s an e-mail I got recently that appears to be from the Dutch bank, Rabobank (basically, it says I can get a more secure debit card):
View attachment 414140
There’s a link to
rabobank.nl/kosteloos-vervangen in the mail — or so it seems. However, if I hover my mouse pointer (which isn’t in the image above) over it, the grey popup you can see in the screenshot appears and tells me where the link
actually goes:
usable-werewolf.10web.site/rb2. In other words: this is a phishing message, intended get me to type in my bank details so they can plunder my account. (FWIW, I don’t have an account at Rabobank so I’ve immediately ignored it anyway.)
They’re not all as obvious as the above, though. Before you click, compare any links carefully to make sure that they are
exactly the same — ignoring the
http:// or
https:// at the start that may or may not be present, because that’s not important here.
In short: if you see what looks like a web site’s address, but holding your mouse pointer over it shows it goes to another address, then it’s a scam.
The mail system I have is Microsoft mail. I used to have their Live Mail programme which had a spam filter that worked really well for me, but when Microsoft had to re-boot my system last year when it stopped working, they told me that they didn't support it any more so I ended up with their new one.
A quick browse around seems to indicate that Windows 10 Mail (which I’m guessing is what you use) doesn’t have a spam filter built-in … If that’s true, I would advise you to switch to a better mailer.
I agree that targeting the companies may be unfair, but my thinking is that they advertise themselves as experts at protecting their customers and are paid millions every year to do just that.
You are getting spam from companies whose services are to protect computers?